Răspuns:
Explicație pas cu pas:
1/9 + 7/9 = 8/9
3/9 + 7/9 = 10/9
2/9 + 7/9 = 9/9
6/9 + 7/9 = 16/9
__________
9/6 - 3/6 = 6/6
5/6 - 3/6 = 2/6
6/6 - 3/6 = 3/6
4/6 - 3/6 = 1/6